After David and Solomon the kingdom of Israel split into two kingdoms, the Northern Kingdom (10 of the 12 tribes) which was called Israel and the Southern Kingdom (2 of the 12 tribes) which was called Judah. One of their main reasons for splitting? Worship. The Southern Kingdom believed the center for worship was Jerusalem. The Northern Kingdom believed the center for worship was Shechem/Samaria. Worship...the thing that is to be the distinguishing characteristic of the people of God was the thing that divided them.
Worship in our churches today is to be the distinguishing characteristic of God's bride...and unfortunately its often what divides the church.
If 'they' use choir robes and an organ they are wrong because 'we' prefer casual worship with a piano.
If 'they' use drums and guitars and have high decibel levels, they are of the devil because that is not how 'we' have worshipped for the last hundred years in this church.
If you are involved in an 'us' and 'them' worship dispute. You need to repent and reconcile with 'them' to make everyone 'us'. Your battle is not against a worship style preference. If it is. You are failing in the gospel. Your battle is against darkness. And often our shortsightedness in our 'agendas and preferences' are what darken the one God intends to radiate light.
Get over yourself and root for your church!